/**
* Calculate stats for the whole group
*
* @since 0.4.0
*
* @access protected
*/
protected function group_stats()
{
$total = $conversions = 0;
$rates = [];
foreach ($this->stats['variants'] as $variant) {
$total = $total + $variant->total;
$conversions = $conversions + $variant->conversions;
$rates[] = $variant->conversion_rate;
}
$avg_conversion_rate = Statistics::mean($rates);
if (0 == $total) {
$conversion_rate = 0;
} else {
$conversion_rate = $conversions / $total;
}
//$std_deviation = Statistics::standardDeviation( $rates );
$this->stats['group'] = new stats($total, $conversions, $conversion_rate, $avg_conversion_rate);
}
/**
* Calculate the average sessions and set in average property
*
* @access private
*
* @since 1.1.0
*
* @param bool $unique Optional. To get unique values or not. Default is true.
*/
private function calculate_average($unique = true)
{
$what = $this->what($unique);
if (empty($this->weeks[$what])) {
$this->find_weeks(4, $unique);
}
if (1 >= count($this->weeks[$what]) && isset($this->weeks[$what][0])) {
$this->average[$what] = $this->weeks[$what][0];
} elseif (1 >= count($this->weeks[$what]) && !isset($this->weeks[$what][0])) {
$this->average[$what] = 0;
} else {
$this->average[$what] = Statistics::mean($this->weeks[$what]);
}
}